package operation;

import book.Book;
import book.BookList;

import java.util.Scanner;

public class DelOperation implements IOPeration{
    public void work(BookList bookList) {
        System.out.println("删除图书！");
        System.out.println("请输入你要删除图书的名字:");
        Scanner scanner = new Scanner(System.in);
        String name = scanner.nextLine();

        int index = 0;
        int currentSize = bookList.getUsedSize();
        int i=0;
        for(i=0;i<currentSize;i++){
            Book book=bookList.getPos(i);
            if(book.getName().equals(name)){
                index=i;
                break;
            }
        }
        if(i == currentSize) {
            System.out.println("没有你要删除的图书！");
            return;
        }
        for (int j = index; j < currentSize-1; j++){
            Book book=bookList.getPos(j+1);
            bookList.setBooks(j,book);
        }
        bookList.setBooks(currentSize-1,null);

        bookList.setUsedSize(currentSize-1);

        System.out.println("删除结束");
    }
}
